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        <table>
            <tr>
                <td><input type="checkbox" name="" id="selectAllbtn" onclick="Checkboxes()"></td>
                <td>标题</td>
                <td>内容</td>
                <td>发件人</td>
                <td>发件时间</td>
            </tr>
            <tr>
                <td><input type="checkbox" class="otherbtn"  name="" id=""></td>
                <td>王嗡嗡</td>
                <td>顶顶顶</td>
                <td>333</td>
                <td>呃呃呃</td>
            </tr>
            <tr>
                <td><input type="checkbox" class="otherbtn"  name="" id=""></td>
                <td>张嗡嗡</td>
                <td>顶顶顶</td>
                <td>333</td>
                <td>呃呃呃</td>
            </tr>
            <tr>
                <td><input type="checkbox" class="otherbtn"  name="" id=""></td>
                <td>刘嗡嗡</td>
                <td>顶顶顶</td>
                <td>333</td>
                <td>呃呃呃</td>
            </tr>
            <tr>
                <td><input type="checkbox" class="otherbtn" name="" id=""></td>
                <td>方嗡嗡</td>
                <td>顶顶顶</td>
                <td>333</td>
                <td>呃呃呃</td>
            </tr>
           
        </table>
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